Tolka, as a woman size does not matter. I have had a variety of men all different sizes and there are so many aspects of sex. Foreplay, a good kisser (bad kisser = bad sex) oral sex (wow), a good finger fuck(two fingers), if you get her ready by the time your cock goes in it will feel huge. The more turned on a woman is the more her pussy swells and you will have a tighter pussy to fuck.
That's just been my experience.